patch 8.0.0445: getpgid is not supported on all systems

Problem:    Getpgid is not supported on all systems.
Solution:   Add a configure check.

Author: brammool

src/auto/configure

@@ -12022,7 +12022,7 @@ fi
 for ac_func in fchdir fchown fsync getcwd getpseudotty \
 	getpwent getpwnam getpwuid getrlimit gettimeofday getwd lstat \
 	memset mkdtemp nanosleep opendir putenv qsort readlink select setenv \
-	setpgid setsid sigaltstack sigstack sigset sigsetjmp sigaction \
+	getpgid setpgid setsid sigaltstack sigstack sigset sigsetjmp sigaction \
 	sigprocmask sigvec strcasecmp strerror strftime stricmp strncasecmp \
 	strnicmp strpbrk strtol tgetent towlower towupper iswupper \
 	usleep utime utimes

src/config.h.in

@@ -158,7 +158,9 @@
 #undef HAVE_FCHOWN
 #undef HAVE_FSEEKO
 #undef HAVE_FSYNC
+#undef HAVE_FLOAT_FUNCS
 #undef HAVE_GETCWD
+#undef HAVE_GETPGID
 #undef HAVE_GETPSEUDOTTY
 #undef HAVE_GETPWENT
 #undef HAVE_GETPWNAM
@@ -167,13 +169,12 @@
 #undef HAVE_GETTIMEOFDAY
 #undef HAVE_GETWD
 #undef HAVE_ICONV
-#undef HAVE_NL_LANGINFO_CODESET
 #undef HAVE_LSTAT
 #undef HAVE_MEMSET
 #undef HAVE_MKDTEMP
 #undef HAVE_NANOSLEEP
+#undef HAVE_NL_LANGINFO_CODESET
 #undef HAVE_OPENDIR
-#undef HAVE_FLOAT_FUNCS
 #undef HAVE_PUTENV
 #undef HAVE_QSORT
 #undef HAVE_READLINK

src/configure.ac

@@ -3609,7 +3609,7 @@ dnl Can only be used for functions that do not require any include.
 AC_CHECK_FUNCS(fchdir fchown fsync getcwd getpseudotty \
 	getpwent getpwnam getpwuid getrlimit gettimeofday getwd lstat \
 	memset mkdtemp nanosleep opendir putenv qsort readlink select setenv \
-	setpgid setsid sigaltstack sigstack sigset sigsetjmp sigaction \
+	getpgid setpgid setsid sigaltstack sigstack sigset sigsetjmp sigaction \
 	sigprocmask sigvec strcasecmp strerror strftime stricmp strncasecmp \
 	strnicmp strpbrk strtol tgetent towlower towupper iswupper \
 	usleep utime utimes)

src/os_unix.c

@@ -3081,7 +3081,7 @@ executable_file(char_u *name)
 }
 
 /*
- * Return 1 if "name" can be found in $PATH and executed, 0 if not.
+ * Return TRUE if "name" can be found in $PATH and executed, FALSE if not.
  * If "use_path" is FALSE only check if "name" is executable.
  * Return -1 if unknown.
  */
@@ -5429,8 +5429,10 @@ mch_stop_job(job_T *job, char_u *how)
 
     /* TODO: have an option to only kill the process, not the group? */
     job_pid = job->jv_pid;
+#ifdef HAVE_GETPGID
     if (job_pid == getpgid(job_pid))
 	job_pid = -job_pid;
+#endif
 
     kill(job_pid, sig);
 

src/version.c

@@ -764,6 +764,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    445,
 /**/
     444,
 /**/